A condenser. suitable for use in the distillation of metals was designed. The temperature of the condensing surface was established by controlling the pressure over boiling NaK-78 contained within the condenser. Performance was evaluated in test units in which pure bismuth was distilled as the test metal.
Burnet, G. and Buchanan, W., "A condenser for the vacuum distillation of metals" (1961). Ames Laboratory Technical Reports. 33.